Hi hashbrown111822 (great user name, btw!)

Am I tracking with you that the two of you are not currently living together (since the breakup on May 1st)?
When he has episodes every few days, that must mean you are finding out about those episodes over text? phone call? social media? other? Is he the one initiating that contact?
As far as you know, is he still in DBT? How often do you think he is going? (weekly, daily, 3x/week, other)?
...
This seems to me like the unintuitive crux of being in a relationship with a pwBPD:
I want to get back together more than anything - but regardless of what happens between us, I also just want him to be okay and feel supported. How can I best help him during this time? Are there specific things that anyone would recommend to make him feel supported without feeling inundated/pressured by me to get back together? Is there anything I can do to encourage more measured thoughts/curb the splitting?
We want so, so, so much to just help the person we love. Our focus and spotlight goes on them: what do
they need, how can we be more supportive of
them, how can we make sure
they feel _________, how can we get through to them with the correct wording?
So much of our energy and self-hood gets funneled over to try to shore up our loved one wBPD... but is that the most loving thing we can do for them?
It may be the case that the most loving, supportive thing we can do for a loved one wBPD is to take care of ourselves first, to model maintaining self-hood and not depleting our self-hood to pour into them. We cannot have enough self for two!
Another unintuitive aspect to this is that we have to accept that we cannot control how they feel or think. Yes, we can make things worse through
JADE-ing,
being invalidating, and not
being empathetic -- that is true that we can add gas to the fire -- but ultimately, once we control our contribution and stop making things worse on our end, we really can't get in their heads and "make sure they feel supported". I think it's one of the tragedies of BPD that without help and therapy, a pwBPD can be surrounded by care and love, but not perceive it.
I'm kind of thinking that letting go of needing a certain outcome in a pwBPD's thoughts -- letting go of needing to be sure he feels supported, letting go of feeling like you have to encourage him to think differently -- could contribute to more stability in the relationship, because in a way, you'd be saying: "I'm stable enough that you can be you, and I don't have to change how you think or feel".
So much of effective relating to a pwBPD is counterintuitive -- kind of like, "he's in so much pain but you're saying I should focus on
myself? Isn't that selfish?" It might be a thought worth diving into and trying out -- seeing what happens when you focus on improving your own sense of self and mental health first.
In fact, that reminds me; are you seeing a therapist or counselor right now? While the pwBPD in my life isn't a partner (it's my husband's kids' mom), I've needed a therapist for years, and it's helped me to keep a level head, not be reactive, focus on what's under my control, and accept what I can't change. Could be worth it for you.
...
Before the breakup, were you in touch with his DBT treatment team at all?